[urq] RE : Mine will not read full : anyone have a fuel guage?

[Louis-Alain Richard]

And if you don't have a Bentley, you can look at these scans of the
official WR shop manual... 

http://www.wrquattro.com/info_data.html 

Fuel gauge testing is at page 127
(http://www.wrquattro.com/QuattroManual/t.QuattroManual131.jpg) 
and IC voltage regulator at page 126
(http://www.wrquattro.com/QuattroManual/t.QuattroManual130.jpg). 

Louis-Alain
Who found these documents VERY interesting, historically and
mechanically...



> 
> Bentley has a procedure you can use to tell which part is faulty.  You
> install a fixed value resistor of specified value in place of the
sender,
> if the gauge does not read the correct level it is the gauge (or the
> voltage regulator) ... if the gauge measures correctly it is the
sender.
> IME the sender is the typical culprit (not only on Audis).
> 
> On many other similar cars you can get a clue as to whether the
voltage
> regulator is bad because other gauges (like coolant temp) will be
> malfunctioning too ... but on the urq only the fuel gauge is in the
> regulated circuit ...
> 
> Steve B
> San Jose, CA (USA)